Human Signal
Broad/Unclear specialization
Quick facts
- Company
- Human Signal
- Service type
- Data annotation / AI training data
- Specialties
- image, text, agriculture
- Hiring status
- Check the company application page for availability
- Website
- Website
- Careers
- Careers page
- Application guide source checked
- Not yet verified
Application process overview
HumanSignal is the company behind Label Studio, the most widely used open source data labeling platform, and its enterprise version. While primarily a B2B software vendor, HumanSignal also runs a Data Annotation Contributor program that invites vetted annotators to work on client datasets through its platform.
Key findings
Application Process: Apply via the Greenhouse job board for the 'Data Annotation Contributor' role; remote-first application with intake screens for skills and availability.<br><br>Assessments: Contributors are screened for language skills, subject-matter expertise, and tool familiarity; often a tool-specific trial task before onboarding to a project.<br><br>Job Types / Expertise: Text, image, audio, video, and time-series labeling; LLM fine-tuning data review; refining labeled data for accuracy and consistency. Some projects need specialized domain expertise (legal, medical, coding).<br><br>Compensation: Rates are not publicly disclosed and vary by project and region; contributor roles are project-based contract work.<br><br>Flexibility: Fully remote; distributed team spans North America, Europe, and South America.<br><br>Challenges / Concerns: Contributor work is not continuous; engagements are tied to client project pipelines, and public reviews for annotator roles are thin.<br><br>Legitimacy: Well-funded company ($30M raised from Redpoint, Unusual Ventures, Bow Capital, Swift Ventures) with 250,000+ users of Label Studio and a visible public-facing team.
Conclusion
HumanSignal is primarily a B2B data labeling software vendor, but its contributor program offers a legitimate path for annotators to work on real AI projects through a well-regarded platform. The application process is formal and project-driven rather than an always-on gig portal, so work availability will ebb and flow with client demand. Pay is not publicly posted, which makes expectations harder to set up-front. For annotators with relevant skills who value working through a modern, open-source tool, HumanSignal is a credible option. It is less suitable for workers seeking guaranteed hours.